CN109750191A - A kind of die casting high-strength and high ductility high thermal conductivity aluminium alloy - Google Patents
A kind of die casting high-strength and high ductility high thermal conductivity aluminium alloy Download PDFInfo
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Abstract
The invention discloses a kind of die casting high-strength and high ductility high thermal conductivity aluminium alloys, the component content of the aluminium alloy is as follows: Si content is 6.0 ~ 7.5 wt.%, Cu content is 0.02 ~ 0.13 wt.%, Fe content is 0.3 ~ 0.7 wt.%, 0.03 ~ 0.15 wt.% of Mn content, 2.6 ~ 4.0 wt.% of Mg content, Sr content are 0 ~ 0.04 wt.%, La, Ce mischmetal content are 0 ~ 0.5 wt.%, remaining is Al.The tensile strength of aluminium alloy of the present invention can reach 350Mpa, and yield strength can reach 280Mpa, and elongation percentage can reach 6%, and thermal coefficient is up to 145W/mK, and die casting thickness is up to 0.8mm.Aluminium alloy provided by the invention has many advantages, such as that high intensity, high tenacity, high thermal conductivity, die casting performance are good, inexpensive, the high-strength and high ductility high thermal conductivity structure function integral piece that can be used in the fields such as mobile phone, computer, communication, automobile.
Description
Technical field
The present invention relates to a kind of aluminium alloys, and in particular to a kind of die casting high-strength and high ductility high thermal conductivity aluminium alloy belongs to coloured
Metal material field.
Background technique
With the rapid development of society, the arrival in communications industry 5G epoch, the continuous promotion of people's demand, 3C Product update changes
In generation, increasingly accelerates.Under the call and guide that national energy conservation and emission reduction, pursuit high quality develop, automotive light weight technology becomes must be by it
Road, these all propose increasingly higher demands to high performance light alloy material.And aluminium alloy has small density, specific strength and ratio
The features such as rigidity is higher, corrosion resistance is good and electrical and thermal conductivity is excellent, Yi Huishou, low temperature performance well, be widely used in communications and transportation,
The technical fields such as aerospace, electronic apparatus, automobile manufacture.
Because die casting is one of main forging types such as 3C, automobile industry components, die casting is used with excellent
Development, the development and application of the aluminum alloy materials of comprehensive performance seem especially urgent, and especially high-strength and high ductility has both good simultaneously
Heating conduction aluminum alloy materials.As being related to mobile phone, notebook radiator, communication apparatus filter etc., auto parts and components in terms of 3C
Aspect is related to partial engine part, lamp bracket thermal component etc., all focuses more on the comprehensive performances such as the high-strength highly-conductive heat of aluminium alloy.
High thermal conductivity aluminium diecasting alloy is researched and developed, is not reduced and is improved the heat-conductive characteristic of material on the basis of Fracture of Material and have become one kind
Trend.Therefore, improving Fracture of Material and thermal conductivity has important application value.
Common pack alloy thermal coefficient is not high in industrialized production at present, and (such as ADC12 thermal coefficient is 100W/
M K or so, ZL101 thermal coefficient are 120W/mK or so), to improve thermal coefficient, the intensity and hardness of material can drop
Low, it is impossible to meet the requirements to material surface survivability, it is difficult to realize while have both the comprehensive of high-strength and high ductility and high thermal conductivity
Close performance.So existing aluminium diecasting alloy is difficult to meet people to high-end structure-function integration aluminium in current industrial production
The application demand of alloy material, therefore, the aluminium alloy that developing, there is high-strength and high ductility to have both Thermal conductivity simultaneously seem especially
It is important.
Summary of the invention
The object of the present invention is to provide a kind of die casting high-strength and high ductility high thermal conductivity aluminium alloys, by adjusting element proportion, with
Si, Mg are main adding elements, are properly added Fe, Mn, Cu, Sr, La/Ce etc..Different from existing aluminium diecasting alloy, this hair
Bright aluminium alloy improves alloy heating conduction while taking into account high-intensitive guarantee material, high tenacity and mobility.The aluminium alloy
The tensile strength of material can reach 350Mpa, and yield strength can reach 280Mpa, and elongation percentage can reach 6%, and thermal coefficient is reachable
145W/mK, die-cast product thickness is up to 0.8mm.
A kind of die casting of the present invention is as follows with the ingredient of high-strength and high ductility high thermal conductivity aluminium alloy:
Si content is 6.0 ~ 7.5 wt. %,
2.6 ~ 4.0 wt. % of Mg content,
Cu content is 0.02 ~ 0.13 wt. %,
Fe content is 0.3 ~ 0.7 wt.%,
0.03 ~ 0.15 wt. % of Mn content,
Sr content is 0 ~ 0.04 wt. %,
La, Ce mischmetal content are 0 ~ 0.5 wt.%,
Remaining is Al.
It illustrates, the Mg of 2.6 ~ 4.0 wt. % is added in the present invention, effective to ensure by adjusting the ratio of Si and Mg
The yield strength of alloy material, so that the yield strength of material can reach 280Mpa or more.This alloy materials is in other yuan
In the similar situation of plain ingredient, if Mg constituent content is lower than 2.6 wt. %, the yield strength of material will be lower than 250Mpa；
If Mg constituent content is higher than 4.0 wt. %, the elongation percentage of material will be lower than 2%.Micro Sr element is added can be to the present invention
Alloy material play apparent metamorphism, remove the slag content of alloy molten solution, and refine crystal grain further, have fine grain strong
The effect of change.Micro La/Ce rare earth is additionally incorporated, melt can be effectively purified, reduces hydrogen content and slag in alloy molten solution
Content, and also have refined crystalline strengthening effect to alloy to a certain extent.And without adding a large amount of Cu member usually to improve the strong of material
Degree, to reduce the production cost of material.
Aluminium alloy provided by the invention has many advantages, such as that high intensity, high tenacity, high thermal conductivity, die casting performance are good, inexpensive, comprehensive
Conjunction is had excellent performance, the high-strength and high ductility high thermal conductivity structure function integral piece that can be used in the fields such as mobile phone, computer, communication, automobile.
To achieve the above object, the present invention takes following technical scheme:
A kind of die casting preparation method of high-strength and high ductility high thermal conductivity aluminium alloy, includes the following steps:
(1) prepare furnace charge.Metal Al ingot, industry Si, Ni metal, Al-Mn intermediate alloy or metal Mn, Mg-Al intermediate alloy or
The raw material as each element in aluminium alloy such as metal Mg ingot, metal Fe, with due regard to after scaling loss, by above-mentioned al alloy component range
Determine that the mass percent of ingredient weighs corresponding raw material；
(2) heating fusing.The raw metal aluminium ingot weighed up to be put into and carries out melting in smelting furnace, smelting temperature is 660 ~ 680 DEG C,
Until aluminium ingot is completely melt that aluminum melt is made；
(3) additional element.Aluminum melt is gradually warmed up from 660 ~ 680 DEG C and is heated to 750 ~ 770 DEG C, in temperature-rise period gradually
Silicon, iron, manganese, copper, magnesium etc. needed for being added, obtain aluminium alloy melt；
(4) it refines and skims.By aluminium alloy melt control 750 ~ 770 DEG C at a temperature of stir 10min, in whipping process plus
Enter the dedicated refining agent of aluminium alloy to be refined；It skims after refining, removes the flux and dross on liquid level；Melting furnace temperature is protected
It holds at 750 ~ 770 DEG C, refining agent is added and carries out double refining, uniform stirring 20min refines interval time control in 50- twice
60min skims after refining its purpose is to allow dross to be more sufficiently disengaged from melt, removes flux and dross on liquid level；
(5) degasification in furnace.Smelting temperature is maintained at 750 ~ 770 DEG C, carries out degasification in furnace with nitrogen, and the degasification time is about 30min,
Then stand 30-50min；
(6) sampling analysis is cast.By aluminium alloy melt heat preservation at 750 ~ 770 DEG C, sampling analysis, ingredient is qualified, by online mistake
It casts after filter and degasification, casting mode uses semi-continuous casting, and it to get finished product is the alloy bar that the type of cooling, which is water cooling,
Material.
The invention has the advantages that the tensile strength of the aluminum alloy materials can reach 350Mpa, yield strength be can reach
280Mpa, elongation percentage can reach 6%, and thermal coefficient can be used in the fields such as mobile phone, computer, communication, automobile up to 145W/mK
High-strength and high ductility high thermal conductivity structure function integral piece.Material flowability prepared by the present invention is good, and die casting performance is excellent, and die casting is thin
Wall pieces thickness is up to 0.8mm.
Specific embodiment
The following are the specific embodiments of invention.Example done in embodiment is only used as example, involved in the present invention
Protected object, be not limited to example, comprising all by the alloying component configured in claims, while the present invention relates to
Material is not limited by forging type.
Embodiment 1
The following are specific embodiments:
(1) whole metal aluminium ingots are put into smelting furnace, smelting temperature is 670 DEG C, until being completely melt that aluminum melt is made, is made
For base fluid；
(2) base fluid is progressively heated at 750 DEG C from 670 DEG C, be gradually added into temperature-rise period required 6.5wt.% silicon,
0.5wt. % iron, 0.11wt. % manganese, 0.06wt. % copper, 3.6wt. % magnesium obtain aluminium alloy melt；
(3) by aluminium alloy melt control 750 DEG C at a temperature of stir 10min, in whipping process be added the dedicated essence of aluminium alloy
Refining agent is refined；It skims after refining, removes the flux and dross on liquid level；Melting furnace temperature is maintained at 750 DEG C, is added
Refining agent carries out double refining, uniform stirring 20min, and refining time control twice is skimmed after 50-60min, refining, clearly
Except the flux and dross on liquid level；
(4) smelting temperature is maintained at 750 DEG C, carries out degasification in furnace with nitrogen, and the degasification time is about 30min, then stands
40min；
(5) aluminium alloy melt is kept the temperature at 750 DEG C, sampling analysis, ingredient is qualified, is poured after on-line filtration and degasification
Casting, casting mode use semi-continuous casting, and it to get finished product is the alloy bar material that the type of cooling, which is water cooling,.Embodiment preparation
The tensile strength of aluminum alloy materials can reach 345Mpa, and yield strength can reach 270Mpa, and elongation percentage can reach 4%, thermal coefficient
It can reach 130W/mK.
Embodiment 2
The following are specific embodiments:
(1) whole metal aluminium ingots are put into smelting furnace, smelting temperature is 670 DEG C, until being completely melt that aluminum melt is made, is made
For base fluid；
(2) base fluid is progressively heated at 750 DEG C from 670 DEG C, be gradually added into temperature-rise period 6.7 required wt.% silicon,
0.4wt. % iron, 0.07wt. % manganese, 0.05wt. % copper, 3.1wt. % magnesium, 0.035wt. % strontium obtain aluminium alloy melt；
(3) by aluminium alloy melt control 750 DEG C at a temperature of stir 10min, in whipping process be added the dedicated essence of aluminium alloy
Refining agent is refined；It skims after refining, removes the flux and dross on liquid level；Melting furnace temperature is maintained at 750 DEG C, is added
Refining agent carries out double refining, uniform stirring 20min, and refining time control twice is skimmed after 50-60min, refining, clearly
Except the flux and dross on liquid level；
(4) smelting temperature is maintained at 750 DEG C, carries out degasification in furnace with nitrogen, and the degasification time is about 30min, then stands
40min；
(5) aluminium alloy melt is kept the temperature at 750 DEG C, sampling analysis, ingredient is qualified, is poured after on-line filtration and degasification
Casting, casting mode use semi-continuous casting, and it to get finished product is the alloy bar material that the type of cooling, which is water cooling,.Embodiment preparation
The tensile strength of aluminum alloy materials can reach 340Mpa, and yield strength can reach 265Mpa, and elongation percentage can reach 4%, thermal coefficient
It can reach 135W/mK.
Embodiment 3
The following are specific embodiments:
(1) whole metal aluminium ingots are put into smelting furnace, smelting temperature is 680 DEG C, until being completely melt that aluminum melt is made, is made
For base fluid；
(2) base fluid is progressively heated at 760 DEG C from 680 DEG C, be gradually added into temperature-rise period 6.9 required wt.% silicon,
0.5wt. % iron, 0.09wt. % manganese, 0.08wt. % copper, 2.9wt. % magnesium, 0.45 wt. % lanthanum cerium obtain aluminium alloy melt；
(3) by aluminium alloy melt control 760 DEG C at a temperature of stir 10min, in whipping process be added the dedicated essence of aluminium alloy
Refining agent is refined；It skims after refining, removes the flux and dross on liquid level；Melting furnace temperature is maintained at 760 DEG C, is added
Refining agent carries out double refining, uniform stirring 20min, and refining time control twice is skimmed after 50-60min, refining, clearly
Except the flux and dross on liquid level；
(4) smelting temperature is maintained at 760 DEG C, carries out degasification in furnace with nitrogen, and the degasification time is about 30min, then stands
50min；
(5) aluminium alloy melt is kept the temperature at 760 DEG C, sampling analysis, ingredient is qualified, is poured after on-line filtration and degasification
Casting, casting mode use semi-continuous casting, and it to get finished product is the alloy bar material that the type of cooling, which is water cooling,.Embodiment preparation
The tensile strength of aluminum alloy materials can reach 340Mpa, and yield strength can reach 275Mpa, and elongation percentage can reach 5%, thermal coefficient
It can reach 140W/mK.
Embodiment 4
The following are specific embodiments:
(1) whole metal aluminium ingots are put into smelting furnace, smelting temperature is 680 DEG C, until being completely melt that aluminum melt is made, is made
For base fluid；
(2) base fluid is progressively heated at 760 DEG C from 680 DEG C, be gradually added into temperature-rise period 7.2 required wt.% silicon,
0.6wt. % iron, 0.09wt. % manganese, 0.08wt. % copper, 2 .6wt. % magnesium, 0.02wt. % strontium, 0.15 wt. % lanthanum cerium, are obtained
Obtain aluminium alloy melt；
(3) by aluminium alloy melt control 760 DEG C at a temperature of stir 10min, in whipping process be added the dedicated essence of aluminium alloy
Refining agent is refined；It skims after refining, removes the flux and dross on liquid level；Melting furnace temperature is maintained at 760 DEG C, is added
Refining agent carries out double refining, uniform stirring 20min, and refining time control twice is skimmed after 50-60min, refining, clearly
Except the flux and dross on liquid level；
(4) smelting temperature is maintained at 760 DEG C, carries out degasification in furnace with nitrogen, and the degasification time is about 30min, then stands
50min；
(5) aluminium alloy melt is kept the temperature at 760 DEG C, sampling analysis, ingredient is qualified, is poured after on-line filtration and degasification
Casting, casting mode use semi-continuous casting, and it to get finished product is the alloy bar material that the type of cooling, which is water cooling,.Embodiment preparation
The tensile strength of aluminum alloy materials can reach 350Mpa, and yield strength can reach 280Mpa, and elongation percentage can reach 6%, thermal coefficient
It can reach 145W/mK.
Claims (5)
1. a kind of die casting high-strength and high ductility high thermal conductivity aluminium alloy, which is characterized in that the ingredient of the aluminium alloy is as follows:
Si content is 6.0 ~ 7.5 wt. %,
2.6 ~ 4.0 wt. % of Mg content,
Cu content is 0.02 ~ 0.13 wt. %,
Fe content is 0.3 ~ 0.7 wt.%,
0.03 ~ 0.15 wt. % of Mn content,
Sr content is 0 ~ 0.04 wt. %,
La, Ce mischmetal content are 0 ~ 0.5 wt.%,
Remaining is Al.
2. a kind of die casting high-strength and high ductility high thermal conductivity aluminium alloy as described in claim 1, which is characterized in that the aluminium alloy
Ingredient is as follows:
Si content is 6.5 wt. %,
3.6 wt. % of Mg content,
Cu content is 0.06 wt. %,
Fe content is 0.5 wt.%,
0.11 wt. % of Mn content,
Remaining is Al.
3. a kind of die casting high-strength and high ductility high thermal conductivity aluminium alloy as described in claim 1, which is characterized in that the aluminium alloy
Ingredient is as follows:
Si content is 6.7 wt. %,
3.1 wt. % of Mg content,
Cu content is 0.05 wt. %,
Fe content is 0.4 wt.%,
0.07 wt. % of Mn content,
Sr content is 0.035 wt. %,
Remaining is Al.
4. a kind of die casting high-strength and high ductility high thermal conductivity aluminium alloy as described in claim 1, which is characterized in that the aluminium alloy
Ingredient is as follows:
Si content is 6.9 wt. %,
2.9 wt. % of Mg content,
Cu content is 0.08 wt. %,
Fe content is 0.5 wt.%,
0.09 wt. % of Mn content,
La, Ce mischmetal content are 0.45 wt.%,
Remaining is Al.
5. a kind of die casting high-strength and high ductility high thermal conductivity aluminium alloy as described in claim 1, which is characterized in that the aluminium alloy
Ingredient is as follows:
Si content is 7.2 wt. %,
2.6 wt. % of Mg content,
Cu content is 0.08 wt. %,
Fe content is 0.6 wt.%,
0.09 wt. % of Mn content,
Sr content is 0.02 wt. %,
La, Ce mischmetal content are 0.15 wt.%,
Remaining is Al.
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| CN110551925A (en) * | 2019-06-26 | 2019-12-10 | 广东鸿图南通压铸有限公司 | method for improving Fe content tolerance of high-strength and high-toughness aluminum alloy for automobile structural part |
| WO2020259534A1 (en) * | 2019-06-26 | 2020-12-30 | 华为技术有限公司 | High thermal conductivity aluminum alloy material and preparation method therefor |
| CN116657005A (en) * | 2023-06-01 | 2023-08-29 | 保定市立中车轮制造有限公司 | Regenerated aluminum alloy material and preparation method thereof |
| CN117431438A (en) * | 2023-12-19 | 2024-01-23 | 广州市型腔模具制造有限公司 | New energy automobile integrated forming alloy and preparation method thereof |
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Cited By (6)
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| CN117431438B (en) * | 2023-12-19 | 2024-03-26 | 广州市型腔模具制造有限公司 | New energy automobile integrated forming alloy and preparation method thereof |
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